New Modules: AWS Network Firewall - rule groups (ansible-collections#944

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New Modules: AWS Network Firewall - rule groups

Sorta-Depends-On: ansible-collections#974
SUMMARY
Two new modules for AWS Network Firewall rule groups.  This first iteration will only support stateful rule groups.
networkfirewall_rule_group.py
networkfirewall_rule_group_info.py
ToDo:

 Initial modules
 Return Value documentation
 Integration Tests
 CI Permissions

ISSUE TYPE

New Module Pull Request

COMPONENT NAME
plugins/module_utils/networkfirewall.py
plugins/modules/networkfirewall_rule_group.py
plugins/modules/networkfirewall_rule_group_info.py
ADDITIONAL INFORMATION
Note: It's a deliberate choice not to support creation of stateless rules initially.  I want to get some of the initial framework in place so that the Policy and Firewall pieces can be built out while waiting on reviews.

Reviewed-by: Alina Buzachis <None>
Reviewed-by: Mark Chappell <None>